Fix the installation

Co-authored-by: Sankar Raj <sankar.raj@crystaldelta.com>

The setup.py references requirements/base.in, so it needs to be included
in the distribution by naming it in MANIFEST.in

This code isn't used?

[BD-24] Improve CI workflow

Fix the reported quality violations

Correct the license copies

Clean up a few things

[BD-24] [TNL-7318] BB-2355: Move LTI configuration to models.

This change moves the LTI configuration retrieval to
a Django model that will LTI configuration.
The current model proxies back the to blocks to keep
backwards compatibility.

See reasoning for change at:
https://github.com/edx/xblock-lti-consumer/blob/master/docs/decisions/0001-lti-extensions-plugin.rst

Send modal to parent window.

Because the courseware microfrontend loads units inside iframes,
the LTI modal ends up being squished and generally ugly.
This PR introduces a new message sent to the parent window to request
a modal containing the contents of the LTI launch iframe.

https://openedx.atlassian.net/browse/TNL-7410

[BD-24] [TNL-7318]: BB-2355 - Add decoding and scope verification methods

Convert is_past_due to a method

This is just to keep it in line with other xblocks that define
an is_past_due attribute. Nicer if they all have the same access
pattern.

[BD-29] [TNL-6993] [BB-2706] Make LTI Consumer indexable

BOM-1953 : Replace pycryptodome with pycryptodomex

[BD-18] remove nose footprints from the project

Merge pull request #87 from open-craft/patrick/BB-2516-lti-improvements-implement-context-claim-on-lti

[BD-24] [TNL-7316] Implement context claim on LTI 1.3